Abstract: A smoke detector device for signalling a smoke detection in a space in an aircraft such as a cabin, a toilet, or a cargo hold of an aircraft, is mounted in a recessed position in a hole in a wall or ceiling of the aircraft. The device has at least one smoke detector enclosed in a housing (3) that also holds a smoke guide ring forming a funnel collar (7) for guiding smoke from a smoke collecting entrance (9) into a detector inlet opening (11) facing toward the space. The funnel collar (7) has a bottom (10) extending essentially on one level with the smoke inlet opening (11) of the smoke detector. The funnel collar tapers from the smoke collecting entrance (9) of the smoke guide rim to the smoke detector inlet opening (11) to form a smoke trap wherein a smoke stream toward the smoke detector is guided and accelerated. The smoke guide rim itself may function as a mounting for one or more smoke detectors, whereby a separate housing is obviated.

Abstract: Fire protection equipment for estinguishing fires in the cargo space of an aircraft includes two containers for extinguishing evaporating liquid; a common conduit system with nozzles distributes the liquid and is directly connected to one of the containers; the other container is also connected to that conduit system but through a series connection of a water adsorption filter, a solid particle filter, a pressure reducing stage, and a throttle to establish a constant flow rate from the second container into the conduit system, a check valve prevents back flow into the latter container.